Cisco Security Advisory
Cisco Access Point Software Denial of Service Vulnerability
A vulnerability in the management CLI of Cisco access point (AP) software could allow an authenticated, local attacker to cause a denial of service (DoS) condition on an affected device.
This vulnerability is due to insufficient input validation of commands supplied by the user. An attacker could exploit this vulnerability by authenticating to a device and submitting crafted input to the affected command. A successful exploit could allow the attacker to cause an affected device to reload spontaneously, resulting in a DoS condition.
Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.
This advisory is available at the following link:
At the time of publication, this vulnerability affected the following Cisco products if they were running a vulnerable software release:
- 6300 Series Embedded Services APs
- Aironet 1540 Series APs
- Aironet 1560 Series APs
- Aironet 1800 Series APs
- Aironet 2800 Series APs
- Aironet 3800 Series APs
- Aironet 4800 APs
- Catalyst 9100 APs
- Catalyst IW6300 Heavy Duty Series APs
- Integrated APs on 1100 Integrated Services Routers (ISRs)
For information about which Cisco software releases were vulnerable at the time of publication, see the Fixed Software section of this advisory. See the Details section in the bug ID(s) at the top of this advisory for the most complete and current information.
Products Confirmed Not Vulnerable
Only products listed in the Vulnerable Products section of this advisory are known to be affected by this vulnerability.
Cisco has confirmed that this vulnerability does not affect any Cisco AP series that is not listed in the Vulnerable Products section of this advisory.
There are no workarounds that address this vulnerability.
When considering software upgrades, customers are advised to regularly consult the advisories for Cisco products, which are available from the Cisco Security Advisories page, to determine exposure and a complete upgrade solution.
In all cases, customers should ensure that the devices to be upgraded contain sufficient memory and confirm that current hardware and software configurations will continue to be supported properly by the new release. If the information is not clear, customers are advised to contact the Cisco Technical Assistance Center (TAC) or their contracted maintenance providers.
At the time of publication, the release information in the following tables was accurate. See the Details section in the bug ID(s) at the top of this advisory for the most complete and current information.
The left column lists Cisco software releases, and the right column indicates whether a release was affected by the vulnerability that is described in this advisory and which release included the fix for this vulnerability.
APs Managed by Wireless LAN Controller (WLC) or Mobility Express (ME)
Cisco Wireless LAN Controller Software Release First Fixed Release 8.9 and earlier Migrate to a fixed release. 8.10 8.10.181.011. Release 188.8.131.52 has been deferred. Cisco recommends upgrading to Release 184.108.40.206.
APs Managed by Catalyst 9800 Series Wireless Controller or Embedded Wireless Controller (EWC)
Cisco Catalyst 9800 Series Wireless Controller Software Release First Fixed Release 16.11 and earlier Migrate to a fixed release. 16.12 16.12.8 17.1 Migrate to a fixed release. 17.2 Migrate to a fixed release. 17.3 17.3.6 17.4 Migrate to a fixed release. 17.5 Migrate to a fixed release. 17.6 17.6.5 17.7 Migrate to a fixed release. 17.8 Migrate to a fixed release. 17.9 17.9.2 17.10 and later Not vulnerable.
The Cisco Product Security Incident Response Team (PSIRT) validates only the affected and fixed release information that is documented in this advisory.
The Cisco PSIRT is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory.
This vulnerability was found by Matthew Street of Cisco during internal security testing.
To learn about Cisco security vulnerability disclosure policies and publications, see the Security Vulnerability Policy. This document also contains instructions for obtaining fixed software and receiving security vulnerability information from Cisco.
Version Description Section Status Date 1.0 Initial public release. - Final 2023-MAR-22
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